# When 271. mg of a certain molecular compound X are dissolved in 25.0g of benzene C6H6, the freezing point of the solution is measured to be 0.5°C. Calculate the molar mass of X. If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits.molal freezing point depression constant (Kf)°C·kg·mol−1  of benzene is 5.07

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When 271. mg of a certain molecular compound X are dissolved in 25.0g of benzene C6H6, the freezing point of the solution is measured to be 0.5°C. Calculate the molar mass of X.

If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits.

molal freezing point depression constant (Kf)
°C·kg·mol−1  of benzene is 5.07

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Step 1

Given:

Mass of molecular compound X=271. mg

Mass of benzene=25.0 g

Freezing point of solution=0.5oC

Molal freezing point depression constant(Kf) of benzene=5.07 OC .Kg.mol-1

Conversion:

From mg to g:

Mass of molecular compound X=271. mg

=271/1000=0.271 g

From g to Kg:

Mass of benzene=25.0 g

=25.0/1000=0.025 Kg

Step 2

To calculate molar mass of X(solute):

First we have to find molality, the following equation is

Step 3

Substitute all the values in the above equation, we get the molal...

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